busybox/coreutils/usleep.c

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/* vi: set sw=4 ts=4: */
/*
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* usleep implementation for busybox
*
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* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
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/* BB_AUDIT SUSv3 N/A -- Apparently a busybox extension. */
//usage:#define usleep_trivial_usage
//usage: "N"
//usage:#define usleep_full_usage "\n\n"
//usage: "Pause for N microseconds"
//usage:
//usage:#define usleep_example_usage
//usage: "$ usleep 1000000\n"
//usage: "[pauses for 1 second]\n"
#include "libbb.h"
/* This is a NOFORK applet. Be very careful! */
int usleep_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int usleep_main(int argc UNUSED_PARAM, char **argv)
{
if (!argv[1]) {
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bb_show_usage();
}
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if (usleep(xatou(argv[1]))) {
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bb_perror_nomsg_and_die();
}
return EXIT_SUCCESS;
}